src/chrome/browser/extensions/extension_web_ui_override_registrar.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_OVERRIDE_REGISTRAR_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_OVERRIDE_REGISTRAR_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/scoped_observer.h"
  10 #include "extensions/browser/browser_context_keyed_api_factory.h"
  11 #include "extensions/browser/extension_registry_observer.h"
  12
  13 namespace content {
  14 class BrowserContext;
  15 }
  16
  17 namespace extensions {
  18 class ExtensionRegistry;
  19
  20 class ExtensionWebUIOverrideRegistrar : public BrowserContextKeyedAPI,
  21                                         public ExtensionRegistryObserver {
  22  public:
  23   explicit ExtensionWebUIOverrideRegistrar(content::BrowserContext* context);
  24   ~ExtensionWebUIOverrideRegistrar() override;
  25
  26   // BrowserContextKeyedAPI implementation.
  27   static BrowserContextKeyedAPIFactory<ExtensionWebUIOverrideRegistrar>*
  28       GetFactoryInstance();
  29
  30  private:
  31   friend class BrowserContextKeyedAPIFactory<ExtensionWebUIOverrideRegistrar>;
  32
  33   // ExtensionRegistryObserver implementation.
  34   void OnExtensionLoaded(content::BrowserContext* browser_context,
  35                          const Extension* extension) override;
  36   void OnExtensionUnloaded(content::BrowserContext* browser_context,
  37                            const Extension* extension,
  38                            UnloadedExtensionInfo::Reason reason) override;
  39
  40   // BrowserContextKeyedAPI implementation.
  41   static const char* service_name() {
  42     return "ExtensionWebUIOverrideRegistrar";
  43   }
  44
  45   // Listen to extension load, unloaded notifications.
  46   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
  47       extension_registry_observer_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(ExtensionWebUIOverrideRegistrar);
  50 };
  51
  52 }  // namespace extensions
  53
  54 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_OVERRIDE_REGISTRAR_H_